/*
 * Copyright (C) 2017-2019 Dremio Corporation
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.dremio.exec.compile.sig;

import java.util.Collections;
import java.util.Map;
import java.util.Set;

import com.dremio.common.expression.CompleteType;
import com.dremio.common.expression.LogicalExpression;

public interface ConstantExtractor {
  default boolean isLarge(int threshold) {
    return false;
  }

  default Map<CompleteType, Integer> getDiscoveredConstants() {
    return Collections.emptyMap();
  }

  default Set<LogicalExpression> getConstantExpressionIdentitySet() {
    return Collections.emptySet();
  }
}
